CN102672125A - Continuous casting equipment and method of gradient steel materials - Google Patents
Continuous casting equipment and method of gradient steel materials Download PDFInfo
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- CN102672125A CN102672125A CN2012101242367A CN201210124236A CN102672125A CN 102672125 A CN102672125 A CN 102672125A CN 2012101242367 A CN2012101242367 A CN 2012101242367A CN 201210124236 A CN201210124236 A CN 201210124236A CN 102672125 A CN102672125 A CN 102672125A
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Abstract
The invention provides continuous casting equipment and method of gradient steel materials. The continuous casting equipment comprises a crystallizer, spray guns and electromagnetic coils, wherein the spray guns are used for adding alloying pellets/alloy blocks to molten steel; and the electromagnetic coils are arranged at the upper end outside the crystallizer and apply electromagnetic forces to the alloying pellets/alloy blocks. According to the equipment and the method, the steel materials with different surface components and internal components can be obtained, the environmental pollution can be avoided and the production cost is lowered.
Description
Technical field
The present invention relates to a kind of continuous casting installation for casting and continuous cast method of ferrous materials, more particularly, the present invention relates to a kind of continuous casting installation for casting and continuous cast method of gradient ferrous materials.
Background technology
The surface treatment of material is meant that the method through machinery, physics or chemistry makes material surface or top layer have the processing procedure of property.The method of for example invading plating, thermal spraying, thermo-chemical treatment through heat improves corrosion resistance, wearability of material etc.Normally used process for treating surface has technology such as carburizing, nitriding, carbo-nitriding in ferrous materials; These process for treating surface especially are applied to materials such as pinion steel, bearing steel, abrasion-resistant stee; Make steel surface have high rigidity and high-wearing feature, and heart portion have high toughness and intensity.Yet thermo-chemical treatment exists many inevitable shortcomings, is example with the carburizing, except environmental pollution, resource consumption, cost increase, also possibly cause internal oxidation, grain coarsening, separate out defective such as net carbide.If ferrous materials has certain component gradient, then can reduce or omit some process of surface treatment, so the production of gradient ferrous materials have certain economic meaning and social effect.
Steel spraying powder is one of secondary refining method that belongs to small investment, instant effect, mainly utilizes carrier gas that " metallurgical material " is written into the molten steel depths through spray gun, is used for external refining processes such as deoxidation of molten steel, desulfurization or carburetting.
Continuous casting, promptly continuous casting steel machine is constantly molten steel after refining to be joined in the crystallizer, and the molten steel forming technique of pulling out from the crystallizer below behind the coagulation forming.If can in casting process, produce the gradient ferrous materials, then can economize on resources and reduce cost.
To sum up, need a kind of method that the gradient ferrous materials is provided, to overcome the problems such as environmental pollution that methods such as chemical treatment are brought.
Summary of the invention
In order to overcome the problems of the prior art, a kind of continuous casting installation for casting and continuous cast method that can reduce cost and avoid the gradient ferrous materials of environmental pollution is provided.
The continuous casting installation for casting of gradient ferrous materials of the present invention comprises: crystallizer; Spray gun is used for alloying pellet/alloy block is added molten steel; Solenoid is positioned at the outer upper ends of crystallizer, and said alloying pellet/alloy block is applied electromagnetic force.
The present invention also provides a kind of continuous cast method of gradient ferrous materials; Said continuous cast method uses above-mentioned continuous casting installation for casting to carry out continuous casting; When utilizing said continuous casting installation for casting to carry out continuous casting, because the electromagnetic force that solenoid produces, alloying pellet/alloy block melts in the molten steel in week in crystallizer.
Preferably, adopt inert gas to utilize lance ejection alloying pellet/alloy block as carrier.The degree of superheat of said molten steel is 10 ℃ to 15 ℃.
Continuous casting installation for casting according to the present invention can obtain the surface component ferrous materials different with internal composition with continuous cast method, and can avoid environmental pollution, and has reduced production cost.
Description of drawings
Through with reference to accompanying drawing the present invention being described in detail, it is more obvious that feature and advantage of the present invention will become.
Fig. 1 is the cutaway view that illustrates according to the continuous casting installation for casting of the gradient ferrous materials of the embodiment of the invention.
The specific embodiment
Hereinafter, will describe embodiments of the invention in detail with reference to accompanying drawing.
Fig. 1 is the cutaway view that illustrates according to the continuous casting installation for casting of the gradient ferrous materials of the embodiment of the invention.In Fig. 1, label 1 is a molten steel, and label 2 is a slag, and label 3 is a crystallizer, and label 4 is a solenoid, and label 5 is alloying pellet/alloy block, and label 6 is a spray gun, and label 7 is that high solutes content is outer, and label 8 is the solute gradient layer, and label 9 is a sandwich layer.
Continuous casting installation for casting according to the gradient ferrous materials of the embodiment of the invention comprises: crystallizer 3, be equipped with molten steel 1 and slag 2 in the crystallizer 3; Spray gun 6 adds alloying pellet/alloy block 5 in the molten steel 1; Solenoid 4 is positioned at the outer upper ends of crystallizer 3.
When utilizing above-mentioned continuous casting installation for casting to carry out continuous casting, the magnetic field that utilizes solenoid 4 to produce produces rotating electromagnetic power in molten steel, thereby molten steel rotates in crystallizer.In molten steel, inject alloying pellet/alloy block 5 through spray gun 6, because molten steel rotates alloying pellet/alloy block 5 evenly the distributing in interior week along crystallizer 3 that therefore sprays under the effect of electromagnetic field.That is alloying pellet/the alloy block 5 that, sprays into is quick Interface Moving to molten steel 1 and crystallizer 3 under the effect of electromagnetic force.Get into the heat melts of the alloying pellet/alloy block 5 absorption molten steel in the molten steel 1.
Because the content of some element is higher in alloying pellet/alloy block 5, thereby alloying pellet/alloy block 5 can change the local composition of molten steel, is formed with the molten steel of certain solute concentration gradient.For example, alloying pellet/alloy block 5 can contain the carbon of high level.In order to satisfy the demand that ferrous materials is smelted, can select the composition of alloying pellet/alloy block 5 arbitrarily.
In addition; Because alloying pellet/alloy block 5 absorbs heat; So will reduce the temperature of the molten steel of circumferential portion in the crystallizer; And melt fully when alloying pellet/alloy block 5 reaches molten steel surface, not free spread fully, form strand with finite concentration gradient so solidify in interior all positions of crystallizer 3.That is, in the position near internal surface of crystallizer, form high solutes content skin 7, the core formation sandwich layer 9 at crystallizer 3 forms solute gradient layer 8 between high solutes content outer 7 and sandwich layer 9.
In addition; If the density of alloying pellet/alloy block 5 is greater than the density of molten steel 1; Then alloying pellet/alloy block 5 can be to the motion of the bottom of crystallizer 3; Absorb simultaneously constantly the heat dissolving, be formed at last near the chemical composition of the position of crystallizer 3 inwalls and the different steel billet of chemical composition at the core of crystallizer 3.
Preferably, the density of alloying pellet/alloy block 5 is greater than the density of molten steel, thereby alloying pellet/alloy block can successfully move downward.In addition, preferably, alloying pellet/alloy block 5 is an almost spherical, and wherein, the surface area of alloying pellet/alloy block 5 and the ratio of volume are in the scope of 0.3～0.6cm-1.In general, the ratio of surface area and volume is big more, explains that the alloying pellet/alloy block 5 of equal volume is just big more with the contact area of molten steel, and dissolution velocity is just fast more.
According to the present invention, the cross-sectional area of spray gun 6 is 2 times to 3 times of maximum cross-section area of alloying pellet/alloy block 5, and uses inert gas to spray alloying pellet/alloy block as carrier.
Preferably, the degree of superheat of molten steel is 10 ℃ to 15 ℃.
For the periphery at ferrous materials is formed uniformly gradient, can uses a plurality of solenoids 4 and a plurality of spray guns 6, thereby form the steel billet that outer surface has the chemical composition gradient equably.
Continuous casting installation for casting and continuous cast method according to gradient ferrous materials of the present invention; Through outer setting solenoid 4 at crystallizer; Make and to utilize alloying pellet/alloy block 5 that spray gun 6 sprays into to be dissolved in interior week in the molten steel along crystallizer 3; Thereby can control the surface composition of the ferrous materials that obtains behind the continuous casting, that is, make the surface component of ferrous materials different with internal composition.Therefore, can obtain having the ferrous materials of the chemical composition of gradient according to continuous cast method of the present invention.
Compare with the method for through chemical heat treatment method etc. the surface of ferrous materials being handled in the prior art, can avoid environmental pollution according to continuous cast method of the present invention, and reduce production cost.The ferrous materials that the continuous cast method of gradient ferrous materials of the present invention obtains can be used for pinion steel, bearing steel etc.
Though the mode with example illustrates and described the present invention, scope of the present invention does not receive the qualification of the foregoing description, without departing from the scope of the invention, can carry out various modifications and change to the foregoing description.
Claims (4)
1. the continuous casting installation for casting of a gradient ferrous materials is characterized in that said continuous casting installation for casting comprises:
Crystallizer;
Spray gun is used for alloying pellet/alloy block is added molten steel;
Solenoid is positioned at the outer upper ends of crystallizer, and said alloying pellet/alloy block is applied electromagnetic force.
2. the continuous cast method of a gradient ferrous materials; It is characterized in that said continuous cast method uses continuous casting installation for casting according to claim 1 to carry out continuous casting; When utilizing said continuous casting installation for casting to carry out continuous casting; Because the electromagnetic force that solenoid produces, alloying pellet/alloy block melts in the molten steel in week in crystallizer.
3. the continuous cast method of gradient ferrous materials according to claim 2 is characterized in that adopting inert gas to utilize lance ejection alloying pellet/alloy block as carrier.
4. the continuous cast method of gradient ferrous materials according to claim 2, the degree of superheat that it is characterized in that said molten steel are 10 ℃ to 15 ℃.
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| CN2012101242367A CN102672125A (en) | 2012-04-25 | 2012-04-25 | Continuous casting equipment and method of gradient steel materials |
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| CN2012101242367A CN102672125A (en) | 2012-04-25 | 2012-04-25 | Continuous casting equipment and method of gradient steel materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111974961A (en) * | 2019-09-19 | 2020-11-24 | 北京科技大学 | Radial functional gradient composite material casting equipment and method |
Citations (6)
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| US5915458A (en) * | 1996-04-30 | 1999-06-29 | Danieli & C. Officine Meccaniche Spa | Method to obtain transverse vibrations of the walls of the crystalliser in an ingot mould by means of a pulsation in the cooling fluid |
| CN1352314A (en) * | 2001-11-03 | 2002-06-05 | 丁刚 | Process for producing hard phase strengthened metal base composite material |
| CN1413782A (en) * | 2002-11-22 | 2003-04-30 | 大连理工大学 | Electromagnetic continuous casting method of multilayer material |
| CN101020230A (en) * | 2006-02-14 | 2007-08-22 | 丁刚 | Steel bond hard alloy multistream continuous casting process and apparatus |
| CN202667581U (en) * | 2012-04-25 | 2013-01-16 | 莱芜钢铁集团有限公司 | Continuous casting device of gradient steel materials |
| CN202667578U (en) * | 2012-04-25 | 2013-01-16 | 莱芜钢铁集团有限公司 | Continuous casting device of gradient steel materials |
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2012
- 2012-04-25 CN CN2012101242367A patent/CN102672125A/en active Pending
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| US5915458A (en) * | 1996-04-30 | 1999-06-29 | Danieli & C. Officine Meccaniche Spa | Method to obtain transverse vibrations of the walls of the crystalliser in an ingot mould by means of a pulsation in the cooling fluid |
| CN1352314A (en) * | 2001-11-03 | 2002-06-05 | 丁刚 | Process for producing hard phase strengthened metal base composite material |
| CN1413782A (en) * | 2002-11-22 | 2003-04-30 | 大连理工大学 | Electromagnetic continuous casting method of multilayer material |
| CN101020230A (en) * | 2006-02-14 | 2007-08-22 | 丁刚 | Steel bond hard alloy multistream continuous casting process and apparatus |
| CN202667581U (en) * | 2012-04-25 | 2013-01-16 | 莱芜钢铁集团有限公司 | Continuous casting device of gradient steel materials |
| CN202667578U (en) * | 2012-04-25 | 2013-01-16 | 莱芜钢铁集团有限公司 | Continuous casting device of gradient steel materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111974961A (en) * | 2019-09-19 | 2020-11-24 | 北京科技大学 | Radial functional gradient composite material casting equipment and method |
| CN111974961B (en) * | 2019-09-19 | 2022-04-29 | 北京科技大学 | Radial functional gradient composite material casting equipment and method |
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Application publication date: 20120919 |